14-02-2018, 07:16 AM
(14-02-2018, 02:25 AM)Bob Culver Wrote: Do Sevens ever draw significant oil through the guides? I would have thought there was little available.
In engines not severely worn or revved and whcih do not ping, broken rings are rare. Comression rings can have a major effect on oil consumption but if gaps reasonable one broken ring will be hard to detect from compression. Oil rings can break but usually by assemblers!
When SUs stick down you do not go anywhere!
I'd look to the HT lead next before taking anything apart. A weaker spark can allow oiling.
Swap the HT lead to no 3 with no 4 and see if the problem moves.
Charles